Research On Comprehensive Benefit Improvement Of Biomass Pyrolysis Based On The Optimization Of Pyrolysis Scheme And Co Production

The economic and environmental problems caused by the global energy shortage and the imbalance of domestic energy supply have made the International and domestic society pay more and more attention to the research on renewable energy sources.Biomass as an excellent renewable energy,biomass pyrolysis method of one of its important energy to produce carbon,bio-oil,pyrolysis gas and other high-quality products,but the heat of the pyrolysis manufacturers are widely used kiln pyrolysis mostly extensive production,only the phenomenon of carbon as the main product,resulting in a serious waste of resources and environmental pollution problems.In view of the above situation,this paper on the basis of the analysis of biomass pyrolysis principle on pyrolysis experiments,and in accordance with the experimental results designed pyrolysis Char yield rate Upgrade Program;pyrolysis flue gas heat was designed based on three condensate recovery system;And on the basis of the above studies for a practical pyrolysis carbon plant biomass polygeneration system design and evaluation of its economic and environmental benefits.The specific research content is as follows:Through the analysis of biomass pyrolysis mechanism to determine the three factors that affect biomass heat kiln pyrolysis carbon production rate,and accordingly the use of tube furnace under anaerobic conditions for wood forming materials to carry out different pyrolysis final temperature?300?-550??,different heating rates?5,10,20?/min and variable heating rate?,Different additives?Na Cl,KCl,CaCl₂?under the conditions of pyrolysis and catalytic pyrolysis experiments,and char-industrial analysis to analyze the quality of char-forming.The higher the heating rate of the pyrolysis process,high temperature pyrolysis yield of carbon the lower the rate of change in the heating rate of the program has a greater impact on the low end of the pyrolysis temperature zone,up to 16% of the carbon yield can be improved,but its impact in the high end of the pyrolysis zone is enhance the effect of about 1.5 times the alkali metal salt group,but its carbon ash content is too high,poor carbon quality.In addition,the kinetic analysis method was used for the thermogravimetric analysis experiment and the CR,FWO method kinetic analysis program for biomass pyrolysis,catalytic pyrolysis process for further analysis,study the impact of these factors on the three-stage pyrolysis of biomass.By Kinetic analysis found that the alkali metal,alkaline earth metal ions to promote pyrolysis char can Ca2+>Na+>K+ sequentially ordered,high temperature catalytic pyrolysis rate can get a higher yield of carbon,in accordance with the conclusion of the study designed for biomass pyrolysis program containing additives,the yield of carbon than pure Biomass Group increased by 23%.Through the analysis of internal heat kiln pyrolysis flue ga to establish a ninecomponent compound model,based on non-condensable gas condensate containing gas,liquid membrane model of the flue gas membrane type condensate equilibrium and physical parameters calculation,and use this data to design the pyrolysis flue gas condensate recovery system three realized in the secondary condenser in the separation of 83.63% of the water collected in the condensing system 90.14% Bio-Oil results.Finally,in accordance with the conclusions of the pyrolysis production experiments,the actual carbon production rate rose from 31.82% to 36.36%,and root reference manufacturers to establish the actual production situation based on pyrolysis flue gas condensate recovery and oil and Gas Co-combustion of biomass pyrolysis polygeneration system,calculated,the system can benefit the plant energy benefit ratio?EBR?increased from 50.56% to 78.29%,and annual savings 1128.07 t standard coal,emission reduction CO₂ 295.56 t,SO₂ 0.96 t,NO_x 0.83 t,it can provide a reference for the industrial application of the system.